Page 3 of 3 FirstFirst 123
  1. Well the machining of the stepper mount has taken a back seat for a while due to the weather - it being too cold to work out in the garage (and I've had a cold too). So I decided to buy a PIC programmer with the original intention of using Kwackers software and a 16F452 PIC but then I decided I wanted the stepper driver to be built in, not a seperate board and, hey ho, I like writing code. So I knocked up a quick breadboard using a 16F877 I had lying around and wrote a fledgling set of routines to read the keyboard, drive the display, create stepper pulses, etc. At the moment this is driving my L297/298 stepper board, but I have some IRF520 logic level MOSFETS and I plan to drive the stepper directly in Unipolar mode with a chopper current limiter. I have a ex-laptop 24v 65W (2A+) power supply that is perfect for the job. The PIC and display take less than 60mA so a straight 7805 regulator on a small heatsink will provide the 5v rail.

    Click image for larger version. 

Name:	DSCN1842.JPG 
Views:	379 
Size:	172.1 KB 
ID:	1734

  2. #22
    Quote Originally Posted by irving2008 View Post
    I was looking at sintered bushes with a view to taking a .375" ID .6" OD bush, opening out to 10mmID and turning it down to 15mm OD.

    Sintered bushes come oversize and go to size when you drive them home. I did try machining one once and it was distinctly odd, they are a bugger to chuck and smear rather than cut

Page 3 of 3 FirstFirst 123

Similar Threads

  1. Diy 4th axis rotary table using 100mm chuck with minimal backlash
    By kingcreaky in forum Linear & Rotary Motion
    Replies: 3
    Last Post: 05-09-2013, 12:03 PM
  2. CNC Rotary table/lathe head indexing
    By Kwackers in forum Electronic Project Building
    Replies: 40
    Last Post: 09-12-2011, 02:33 PM
  3. Which chuck to fit 6" rotary table??
    By wiatroda in forum General Discussion
    Replies: 19
    Last Post: 10-08-2011, 07:47 AM
  4. Mounting a chuck on a Rotary table
    By irving2008 in forum Machine Discussion
    Replies: 17
    Last Post: 02-09-2010, 06:23 PM
  5. Setting up work on the rotary table
    By irving2008 in forum Machine Discussion
    Replies: 6
    Last Post: 09-01-2010, 09:27 AM


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts